Cache control directive for Anthropic prompt caching. Only applicable to Anthropic Claude models. When set, marks the content block as a cache breakpoint.
Time-to-live for the cache entry. Default is "5m" (5 minutes). "1h" (1 hour) is supported on select models (e.g. Claude Opus 4.5, Haiku 4.5, Sonnet 4.5).
Cache control directive for Anthropic prompt caching. Only applicable to Anthropic Claude models. When set, marks the content block as a cache breakpoint.